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| TPA2028D1_10 Datasheet, PDF (5/37 Pages) Texas Instruments – 3-W Mono Class-D Audio Amplifier with Fast Gain Ramp SmartGain™ AGC/DRC | |||
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TPA2028D1
www.ti.com
SLOS660 â JANUARY 2010
OPERATING CHARACTERISTICS
at TA = 25°C, VDD = 3.6V, EN = 1.3 V, RL = 8 ⦠+33 mH, and AV = 6 dB (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
kSVR power-supply ripple rejection ratio
VDD = 3.6 Vdc with ac of 200 mVPP at 217 Hz
faud_in = 1 kHz; PO = 550 mW; VDD = 3.6 V
THD+N Total harmonic distortion + noise
faud_in = 1 kHz; PO = 1.25 W; VDD = 5 V
faud_in = 1 kHz; PO = 710 mW; VDD = 3.6 V
faud_in = 1 kHz; PO = 1.4 W; VDD = 5 V
NfonF Output integrated noise
Av = 6 dB
NfoA Output integrated noise
Av = 6 dB floor, A-weighted
FR
Frequency response
Av = 6 dB
20
Pomax Maximum output power
h
Efficiency
THD+N = 10%, VDD = 5 V, RL = 8 â¦
THD+N = 10%, VDD = 3.6 V, RL = 8 â¦
THD+N = 1%, VDD = 5 V, RL = 8 â¦
THD+N = 1% , VDD = 3.6 V, RL = 8 â¦
THD+N = 1% , VDD = 5 V, RL = 4 â¦
THD+N = 10% , VDD = 5 V, RL = 4 â¦
THD+N = 1%, VDD = 3.6 V, RL = 8 â¦, PO= 0.71 W
THD+N = 1%, VDD = 5 V, RL = 8 â¦, PO = 1.4 W
TYP
â70
0.1%
0.1%
1%
1%
42
30
1.72
880
1.4
710
2.5
3
91%
93%
MAX
20000
UNIT
dB
mV
mV
Hz
W
mW
W
mW
W
W
CI
+
Measurement
Output
CI
â
TEST SET-UP FOR GRAPHS
TPA2028D1
IN+ OUT+
INâ
VDD
OUTâ
GND
Load
30 kHz
Low-Pass
Filter
+
Measurement
Input
â
+
VDD
â
1 mF
(1) All measurements were taken with a 1-mF CI (unless otherwise noted.)
(2) A 33-mH inductor was placed in series with the load resistor to emulate a small speaker for efficiency measurements.
(3) The 30-kHz low-pass filter is required, even if the analyzer has an internal low-pass filter. An RC low-pass filter (1 kâ¦
4.7 nF) is used on each output for the data sheet graphs.
Copyright © 2010, Texas Instruments Incorporated
5
Product Folder Link(s): TPA2028D1
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